Safety-adjuster for ignition-timers.



B. N. DAVIS. SAFETY ADJUSTER FOR IGNITION TIMERS.

APPLIOATIUN FILED JUNE 2, 1908.

Patented May 18, 1909.

rv (Mun 1. I6 NITION In!!! T anvewbo z ,Bemzlss Iflavzlaj mlli-fwo'oneui UNIT D STATES liriIENT OFFICE.

no. 921,963. Specification of Letters Patent. Patented May 18, 1909. Application filed June 2, 1808. Serial No. 586,199.

To all whom it ma concern: 1 thou htlessly displace the timing lever so as Be it known t at I, BnMiss N DAVIS, a to ho d it in an improper position while some citizen of the United States, residin at New one is cranking the engine. Orleans, in the parish of Orleans an State of With these and other objects in view my 5 Louisiana, have invented certain new and invention consists in the features of con- 55 useful Im ,rovements in Safety-Adjusters for struction and combination as hereinafter set Ignitionimers, of which the following is a forth and claimed. full, clear, and exact descri tion. In the drawings: Fi ure 1 is a top or plan My invention relates to ignition apparatus view ofa circuit contro ling apparatus having for explosion engines, and more particularly an embodiment of my invention applied 60 consists in a device or attachment for th thereto. Fig.2isaside elevation of the same. usual circuit controller or timer by which it! Referring to the drawings, in. which like is made impossible for the engine to be startparts are designated by the same reference ed with the ignition occurring too earlyin the sign, 1 designates the frame or casing of a cycle. circuit controller which contains the seg- 65 7 As well known, the cranking of an en 'ne ments or contacts 2 concentrically disposed when the i nition apparatus is adjusts to around the half-time or other shaft 3. give an ear y spark is very dangerous, being 4 de ates the rotating contact arm caralmost certain to produce a kick-back of ried by i aft 3 and which may be of any dethe engine, and, unless the operator has this sired construction. l 70 detail constantly in mind, an .accident is In the form of the invention shown, the 'kely to occur sometime by reason of his fortime of occurrence of thei nition is varied by getfulness. swingingthe casing Pan arly about its cen- It is the purpose of the present invention tral axis coincident wit the shaft 3. For to entirely relieve the mind of the operator 1 this purpose the casing has a projectin arm 75 from this detail, automatically making it im- 5 w 10h moves over a fixed-sector 6. n the possible for the spark to be adjusted at a too present embodiment of the invention the secearly position while the engine is being tor 6 is fixed directly to the frame of the en'- cranked. After the en he is started, howgine E, and constitutes the bearing for the ever, the circuit control er can be adjusted as, rotata l e casing 1 of the circuit controller. 0

usual and can be made to remain atan early The casing may be held against vertical disor "late, 'or any other-ignition period of the placement by a collar 3 on the shaft 3 which engine cycle. 7 directly engages and supports the bottom ncarrying outm inventlonlmake use of portion '1 o the casing which projects an'electric current erived from the dynamo slightly beyond the sector 6, as shown in 5 or magneto generator of the ignition system. Fig. 1.

This current'is employed to energize a magt is to be understood that the particular net which controls dogs or detents in such a form of circuit controller and the nature of ,(way that two separate functions are secured, its controlling lever or means constitute no 40 first, an automatic return of the timing lever part of my present invention. The form or circuit controller to its normal or late shown is merely a convenient one for urspark position whenever the engine is oses of illustration, because the contro ing stopped, and second, the prevention of any ever is directly associated with the circuit movementof the circuit controller or timing controller casing. It will be evident how- 46 lever from this position until the engine is ever, that my invention is equally a p 'cable again running properly. Thus the timing to circuit cont-rollers which have t ieir conever cannot continue in an early spark positrolling or timing levers situated at a remote tion should it be accidentally left that way p int and connected thereto by intervening when the engine stops, nor can an in'experlinks-and evers. In the case of an auto- 60 enced or careless person iguorantly or mobile, for example, there is usually provided cuit controller 1 and to t any suitable sprin a sector and timing lever somewhat similar in their form and arrangement to the parts 5 and 6 of Fig. 1, but which are supported on the post of the steering wheel 7 designates an electromagnet attached to the circuit controller or its associated timing lever5. I have shown'it secured by means ofa band 8 which extends over the electromagnet and is screwed or riveted to the lever 5 at the points 9.

10 designates a downwardly extending portion of the lever 5 which carries a fulcrum for a rigid double pawl 11 ivoted to the part 10 by a pin 12, he dou le pawl 11 has at one end an upward extension 13 which is preferably sprmgyor resilient and which has an armature 14 in proximity to the'pole or poles of the electromagnet 7.

15 and 16 denote curvedracksections, of

which the rack 15 is adapted to be engaged bytlie dog 15' of the double pawl 11, while theraok 16 is in the path of thedog 16. These .rack sedtions have their teeth pointed in opposite ways, the section 15 cooperating with dog 15 to prevent a movement of the timing lever to the left in the drawings, while the rack section 16 cooperates with its dog 16 to prevent a movement of the timing lever to the right.v

17 denotes a spiral springafixed to the cir+ e frame of the sector 6, so as to normally impel the circuit controller angularly to its normal position. of rest or starting position, to the extreme left in Fig. 1 and corres ondingto the proper position for'cranking-t e engine.

The operation is as follows Assuming that the engine is at rest, it is evident'that the dynamo or magneto generator M (driven of course in the usual way by the engine) willalso be at rest, and not generating any cur'* rent. Accordingly in the circuit L V of the generator M will be deenergized. T he armature 14 will be unattracted', and the double pawl 11 will swing to 'a position the reverse of that shown ig. 2 y virtue of ponderating weig t ofits right-hand end which carries the spring 13 and its armaturei Under these circumstances the do 15 will be disenga ed from its rack, and t espring 17 will be ree to. impel the timin lever to ward the left to its starting or ate-spark' position. This movement is not resisted b the dog 16 which slides .idly over its rac teeth 16 in an movement of the timing lever to the left. ut the timing leyer, once having arrived at its proper starting or latespark position, cannot be again displaced t erefrom until the engine has started, on accountof the engagement of said dog; 16'? with its rack.

T eope'rator of the carer the magnet 7 which lies ectly across the terminals or on account of the preandada' ted to b throw'lr'outo engine can therefore crank his engine with perfect assurance that the spark lever is not out of proper starting position, and this regardless of any oflicious or careless ersons who might be endeavoring tomani ulhte the lever prematurely at this. time. 1.s soon as the engine is properly running and the magneto or generator M is delivering current, the armature 14 will be attracted by the magnet 7, the double pawl 11 will be thrown into its full line posit1on shown in Fig. 2, and the timing lever '5 may be thrown to, running position where it is held by the en agement of the dog 15' with the-rack 15. he lever may be readily manipulated backward and forward from one position to another ment.

What I claim is:

1. In an ignition system for explosion enines, a devlce for varying the period of the ignition in the engine cycle, means for impelling said device to a late ignition relation, an electro-magnet for normally restraining said device ainst such movement, and an electric circuit completed when the engine is running for energizing said electromagnet.

2. In an ignition system for explosion engines, a device for varying the period of the ignition in the engine cycle, means for impelling said device normally to a late'ignition relation, a detent for restraining said device in such relation,-and an electro-magnet for moving said detent to release said device.

3. In an ignition system for explosion onines, a device for varyin the period of the ignition in the engine cyc e, means normally impellingsaid device to a late spark relation, an electro-magnet having an armature with a detent for restraining the movement of said device to such relation, and a circuit carrying current whenever the engine is runinng ,and

gine stops. 1 v 4. In ana paratus of the class described, a

controlling evice, a magnetcarried'thereby,

a fixedra'ck, and a dog displaced by said magnet and adapted to engage said rack.

5. In an a paratus of the class describedfa controllin evice,-a-m" not carried thereby, afixe'drac and a dog t 'r' engaging said-rack its engaging relation. y said agnet.

by pressing on the armature 14 or onithe dog 16 with the finger during any backward moveincludi'ng said electro magnet, whereby-said detent is released when thaen- 6. In ana paratus of the class described, a

controlling evice, a magneflojirried thereby a fixed rack, and a dog for engaging said. rackand adapted to be thrown intoits engaginlgnrelationby said magnet."

an apparatus of the class described, a

controll' evice, a magnet carried thereby, a pair of ed racks, and a pair of dogs for engaging said reeks, one of said dogs bein net, and-a pair of racks respectively engaged thrown into its engaging relation by sai by the dogs of said double pawl. 11 magnet, and the other dog being releasedto In witness whereof, I subscribe my signaengage its rack by said magnet. ture, in the presence of two witnesses.

8. In an apparatus of the class described, BEMISS N. DAVIS. a movable member having a m agn'et a rigid Witnesses: double pawl pivoted to said member and CHAS. FRFLETOHINGER,

having an armature attracted by said mag- ALEX FERRER. 

